James d



4 (ModeL) J. D. MATTISON.

LOCK.

' Patented Dec. 6,,1881;

INVENTOR: 40m Jmwam- By his Attrneys, M, M

WITNESSES.

35m. 'K DQMM her, Wan-m UNrrn TATES V JAMES D. MATTISON, OF NEW YORK, N. Y.-

LOCK.

SPECIFICATION forming part of Letters Patent No. 250,449, dated December 6, 1881. Application filed April 9, 1881. (ModeL) To all whom it may concern:

Be it known that I, JAMES 1). MA'rTisoN, a citizen of the United States, residing in the city, county, and State of New York, have invented certain Improvements in-Locks,of which the following is a specification.

My invention relates to that class of locks in which tumblers actuated by bit on the key must be lifted and cleared from their stops before the bolt can be shot.

The novel features of the invention consist partl yin the peculiarconstruction and arrangement of the tumblers with respect to the bolt,

"and partly in a provision for locking the bolt by means of a slide and auxiliary key, whereby said lock is rendered inoperative by the ordinary key.

In carrying out my invention my aim has been to constructa cheap and simple lock for ordinaryuse which will be very difficult to pick, and which will be capable of resisting the use even of a duplicate of the key ordinarily employed for shooting the bolt, requiring that both keys shall be employed before the bolt can be shot where the are employed. The bolt may, however, be left unlocked when desired, so that the ordinary key will operate it.

In the drawings, which serve to illustrate my invention, Figure 1 is a side view of my lock, the cap-plate of the case being removed to show the internal mechanism. This view shows the bolt in its normal position and ready to be shot by the ordinary key. Fig. 2 is a similar view to Fig. 1, except that it shows the bolt shot or protruded. Fig. 3 is a similar view to Fig.2, except that itshows the bolt locked and in a situation requiring the use of the auxiliary key before the ordinary key can be employed. Fig. 4 is a section taken on the line as :v in Fig. 1, looking in the direction of the arrow. This view shows therelative positions of the bolt and tumblers. Fig. 5 is a side view of the bolt detached. Figs. 6 and 7 are side views of the rear tumblers detached. Figs. 8 and 9 are respectively a side and edge view of the slide for actuating one of the tumblers. Fig. 10 is a view showing the ordinary key of the lock; and Figs. 11 and, 12 are respectively a side and end view of the auxiliary or bolt-locking key.

necessary precautions I have shown my invention as applied to an ordinary mortise-lock.

A is the case containing the operative parts, the cap B of which is or may be secured by means of a screw, a. A hole, I), in the case forms a bearing for the spindle when it is. inserted in the lock.

O is the bolt, the head of which plays in an aperture in the lock-case in the usual way, and the shank plays between guide-pins or keepers c 0, attached to the case.

So far as described the lock presents no novel features.

In the inner endof the bolt-shank is fixed a pin, d, on which the tumblers are hung. Its function is simply to connect the tumblers with the bolt, and it may be secured to either the bolt or one of the tumblers.

D is the inner tumbler, or that which lies next to the lock-casing. This is the tumbler upon which the key acts in moving the bolt. The key does not act directly upon the bolt; but when it is turned the bit 1 (see Fig. 10) takes under the tumbler D, lifts it to clear an ordinary tumbler-stop, c, fixed to the case A, and moves the tumbler and the bolt connected with it by the engagement of said bit 1 with a notch or recess, f, in the tumbler. The tumblers are all, by preference, normally depressed by springs g g in a well-known way.

Interposed between the bolt and the tumbler D is a tumbler, E, which, like the bolt, is not acted upon directly by the key. This tumbler has a zigzag cam-slot,h, in which plays a pin, 2', on a slide, F. (Shown detached in Figs. 8 and 9.) This slide plays in a curved slot, j, in the bolt, and in its lower edge is a recess, It, to engage a bit, 2, on'the key. A flange, l, on the slide takes under the bolt playing in a recessed part of the same, and serves to give the slide a steady bearing in its movement to and fro. When the bolt and its accessories stand as in Fig. 1, and the key is inserted to shoot the bolt, the bit 1 actuates the tumbler D, as before described. Simultaneously therewith the bit 2 engages the recess in the slide and drives it over to the position shown in Fig. 2. In its movement, however, the pin i at its back traverses the cam-slot h in the tumbler E and lifts that tumbler clear of the tumbler-stop 6, otherwise the bolt could not be shot.

extremity of the key occupied when I will now describle the operation of locking the bolt by meansofthe auxiliary key. (Shown in Figs. ll and 12.)

The slide having been drawn forward, as in Fig. 2, in shooting the bolt, it is obvious that if it be thrown back to its first position without disturbing the bolt, the ordinary key cannot be employ ed to shoot the bolt. To accomplish this return movement of the slides I employ the auxiliary or locking key. This key differs from the ordinary key in two important respects. In the first place the bit 1, which shoots the bolt-,is omitted and the bit 2 is hereled or pointed, so that it may take properly against the beveled faces an m of the slide in unlocking the bolt. This auxiliary key is inserted in the lock and turned to the right. The bit 2 takes in the recessk ofthe slide and throws it over to the position shown in Fig. 3. This does not disturb the bolt, as the bit 1 is omitted, as before stated. The auxiliary key is then removed by turning it back to the position it inserted. The ordinary key is now inoperative on the lock, as the tumbler E cannot be lifted until the slide F is again returned to its normal position, and this cannot be done by means of the ordinary key for obvious reasons. Therefore to replace the slide the auxiliary key must be employed. This key is inserted and turned to the left. Its bit2 engages a beveled t'ace,m, of the slide and throws it over to the left. The lock is now again in position to be operated by the ordinary key.

- To serve as an additional security against the lock being picked, and to form a stop for the slide, 1 provide the lock with a tumbler, G, on the outside of the bolt. This tumbler is, by preference, hung on "the pin d with the other tumblers and provided with an angular slot, n, for a pin, 0, on the face of the slide to play in when the slide is thrown. This pin engages recesses at the ends of said'slot, as cleaily shown. The tumbler G is lifted by a bit, 5, which appears on both of the keys. By thus placinga tumbler on each side of the bolt, both of which must be raised before the bolt can be shotthe latter not being capable of vertical movement-the difficulty of picking the. lock is greatly increased, as the solid mass of the bolt-shank is interposed between them, and both must be lifted simultaneously before the bolt can be moved.

It will be understood that other tumblers may be used, if desired, and I have shown in Fig. 4 a space between the cap B and tumbler G sufficient to admit. ofanother; but the three tumblers shown are enough to illustrate the operation of the lock.

The slotj in the bolt is made curved and concentric with the axis of the key-spindle, by preference; but this is not absolutely necessary, nor isit necessary that the slide be constructed exactly as shown.

To insure the bolt being shot home when the ordinary key is employed, I may provide said bolt with a lug or shoulder-,p, (shown in dotted lines in Fig. 5,) for the bit 3 of ,the key to engage as it is turned on around after looking. Thislug, as herein shown, stands out in the same plane with the tumbler G; but with a slightly different construction ot the parts it might be arranged in the same plane as the bolt-shank.

It will be understood that this is only a precautionary device, and will only comeinto play when the bolt fails to shoot properly. When the bolt plays as it should, and as it generally will, the key will not act on said lug or projection.

Having thus described my invention, I claim- 1. In a lock,the combination of a bolt having longitudinal but no lateral movement, a tumbler hung or hinged to said bolt and arranged to be lifted and moved longitudinally by a bit on the key, a slotted tumbler, also hinged to the bolt and arranged to be lifted to free it from the tumbler-stop, and a slide arranged to play in a slot in the bolt, and having a pin to engage a cam'slot in the said slotted tumbler, whereby the said tumbler is lifted by the movement of said slide, substantially as and for the purposes set forth.

2. The combination of the bolt, the slide, the bolt-actuating tumbler, the tumbler actuated by the slide, and the tumbler for locking the slide, all arranged to operate substantially as set forth.

3. A look having a tumbler arranged to be lifted and freed from the tumbler-stop only by the movementot' a slide which plays independently of the bolt and other elements of the lock, whereby when the said slide is thrown out of its normal position, as left by the key in shooting the bolt, the bolt cannot be operated by the ordinary key. employed with the lock, substantially as set forth.

4. A look comprising a bolt having end-play, but no lateral play, a tumbler hinged to said bolt, and arranged to be actuated by the key in a manner to shoot the bolt, a tumbler arranged to be lifted and freed from the tum blerstop by means only of a slide which plays independenily of the bolt and the other elements of mechanism, but is actuated by the key in shooting the bolt, the ordinary key of the lock having a bit to actuate the bolt actuating tumbler and another to actuate the slide, and an auxiliary key having a bit to actuate the slide, but none to actuate the bolt,all combined and arranged to operate substantially as set forth.

5. The combination of the bolt 0, provided with a slot to receive the slide, and a tumbler to actuate the bolt, hinged thereto, the tumbler E, provided with a slot, h,the slide F, provided with a pin, 4 to playin the slot h, the ordinary key provided with bits 1 and 2, and the aux iliary key pi ovided with the bit 2, all arranged to operate substantially as set forth.

6. The combination, with the slide F, provided with beveled shoulders at in, of the auxiliary key having a bit to actuate said slide, and provided with beveled faces, substantially as and for the purposes set forth.

7. The combination, with the bolt having a slot to receive the slide, the slide having pins z'and 0 to engage slots in the tumblers, the tumbler D, having a notch, f, to receive a bit of the key, the tumbler E, having a slot, h, to receive the pin i on the slide, the tumbler G, having a recessed slot, 'n, to receive the pin 0 in the slide, the springsgg, to keep thetumblers elastically depressed, and the casing provided with suitable keepers for the bolt, and the tumbler-stop e, allarranged to operate substantially as and for the purposes set forth.

8. A look having a bolt arranged to play longitudinally and to be actuated by the ordi- 

